Press.



E. L. McGARY.

PRESS.

APPLICATION FILED NOV- 8 1916. www@ Patented Apr, 29,1919.

4 SHEETS-SHEET l1 l. j. Egg/,2,

E. L. VICGARY.

PRESS. APPLICATION FILED NOV. 8, i916.

Patented Apr. 29,'1919.

E. L. lVIcGARY.

PRESS.

APPLICATION FILED Nov. s. 1916.

'Patented Apr. 29,19l9.

4 SHEETS-SHEET 3.

LLQQI.

E. I.. IVICGARY.

PRESS. l APPLICATION FILED NOV- 8. 1916.

` Patented. Apr. 29, 1919.

4 SHEETS-SHEET 4.

entran nr orrron IPE/ESS.

Patented Apr.. 22, Multi). appncation met november a, raie. serial no. 130,117'.

Specification of Letters Patent.

To all whom z't may concern lBe it known that l, EUGENE L. MCGARY, a citizenof the United States, and a resident of Chicago, in the county of Cook and-State of lllinois, have invented certain new and useful improvements in Presses, of which the following is a full, clear, and exact description.

rlhe invention\relates to presses operated by fluid pressure and more particularly to the type which is adapted to form a product between coacting male and female dies and in which a charge of material, such as bakelite, is placed into the female die by the operator.

ln the operation of presses of this type, it

. has been found necessary to provide an ejector to move the product out of the female dies so that it can be removed from between the dies by the operator'and these ejectors are usually operated by the fluid pressure mechanism which operates the movable diethrough a lost motion connection which causes the ejector to discharge the product at the end of the separating stroke and to be shifted into inoperative position duringthe initial operation of the operating or working stroke."- 'lhs operation has been found to be dangerous if the operator placed the charge of material in the female die during the working stroke and after the ejector has been restored to its normal position or in the female die.

rlhe primary object of the invention is to providelan improvedpress in which the ejector is operated by the fluid pressure mechanisrn at the end of the die-separating stroke with means for independently or manually restoring the ejector into the female die before the working stroke of the dies is commenced and thus adord opportunity fo-r the operator to place the charge of material in the female die while the Huid pressure mechanism is at rest.

@ther objects ofthe invention will appear from the following description.

The invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

ln the drawings: Figure l is a side elevation of a press embodying the invention.'

Fig. 2 is a front elevation. Fig. 3 is a vertical transverse section, showing the parts in position assumed at the end of a separating or idle stroke, the ej actor-mechanism having been operated to move the product or molded articles out of the female dies. Fig. 4c is a vertical section taken on line /l--t of Fig. 2, the parts being shown in position assumed at the end of a working stroke and when the articles have been formed by the dies. Fig. 5 is a similar view showing the parts in position assumed at the end of a separatin stroke, the movable die-carrying member geing at rest and the ejectors in position to permit the female dies to be charged with material. Fig. 6 is a similar view showing the parts in position assumed at the end of a separating stroke. Fig. 7 is a section taken on line 7 7 of Fig. 3. 4Fig. 8 is a horizontal section taken on line 8--8 of Fig. 3.

'lhe press comprises standards l() to which are rigidly secured by bolts l a bed ll.. A. die block l2 having female dies lll.- therein is rigidly supported above the bed 1l by brackets l which are adjustably secured to the bed by bolts 16. Vertical supporting and guide rods l? are rigidly secured in the bed ll.. A cross-head 18 is vertically slidable on said rods and a die block 19 carrying male dies 20 is suitably secured between the rods l? to the underside of the cross head. Fluid pressure mechanism for operating the cross head and male dies comprises a cylinder 2l which has a head 2l fii'redly secured on the upper ends of the rods i7 by nuts 17., and a piston 22 to which the cross head i8 is secured and which is adapted to be operated for la working stroke to bring the dies together or by duid pressure in the cylinder 2l. llt will be understood that suitable duid pressure supply and controlling means (not shown) will be provided for the cylinder 2l. The cylinder 2l and piston 22 constitute the fluid pressure mechanism for imparting the operative stroke to the movablev die carrying member 18.

The mechanism for retracting the movable die carrying member and the piston 22 comprises a pair of quick-return cylinders 23 which are fixedly secured on head2l at the sides ofthe cylinder 2l andare adapted to receive fluid under pressure to operate pistons 2l. Each piston 24 has connected. to its upper end a cross head 25 and a pair of vertical rods l26 connect each cross-head 25 and the movable die carrying member 18, the rods 26 being slidable through head 2l on the lower end of the cylinder 2l.

Each female die is provided with an ejeclil@ lll@

tor-head 28'normally disposed in a recess 29 beneath said die and secured on the upper end of a stem 30 .which is vertically slidable in and is extended through and below said die block. The lower ends of the stems 30 are secured as by screw-threads 31 to cross bars 32 which are disposed in the space between the die-block supporting brackets 15 and are vsecured at their ends to end bars 34 by screwsv33. Each of these end bars is secured, as by screw-threads 35, to the upper end of a pair of rods 36 which extend through and slide vertically in the bed 1'1. All of these rods 36 have their lower ends secured by nuts 37 to a cross-head 38. A

coil spring- 39 is provided around each rod 'thereon 36 and interposed between saidcross-head andthe bed 11 to normally and yieldingly hold the cross head 38 and the ejector supporting and operating structure normally lowered so that the ejector heads 28 will lie within the recess 29. The mechanism for operating the ejector structure against the force of springs 39 comprises a trip lever 40 which is pivoted on a fulcrum pin 41 held in lugs 42 on the top of a. cross-bar 43 which has its ends rigidly secured to rods 44 which extend through the bed 11 and have their upper ,ends secured to 'the head 18 which is operated by the fluid pressure mechanism. Lever 40 comprises a. pair of lugs or arms 47 l which are adapted to act as abutments to engage and lift the cross-head 38 and the ejector operating structure, and an arm 48 extended around the rear of the cross-bar 43 and rearwardly offset with respect to the fulcrum pin so that it will, by gravity, operate to hold the arms 47 in position to op` erate the cross-head 38.y A stop 43 limits the movement of the lever in one direction. A treadle stirrup 49 is secured to and extends forwardly from arm 47 so that the operator, by depressing the front end of the stirrup with 'his foot, can operate the lever to swing the arms 47 forwardly to release yor trip the cross head 38. .Upon such release, springs 39 will lower the cross head 38, rods 39, side bars 34, cross-bars 32 and the ejector stems 30 a`nd heads28. A stud 50 is secured in the cross head 38 and is slidably mounted in bed 11 to coperate with the rods 36 in vertically guiding the ejector mechanism. l

In practice, it is desirableto adapt the ejector mechanism for operation in connection with different die-blocks or die-blocks having different numbers or shapes of female dies therein. For this purpose, the transverse bars 32 are removably connected by the screws 33 t0 the side bars' 34.1"10 adapt the ejector mechanism for different die-blocks or dies, it is only necessary to substitutel transversey bars 32 with ejectors arranged for a given die-block. 'The operation of the invention will be as follows: .assuming the parts to be in position shown in Figs.

1, 2, 3 and 6, and assumed operation or at the end of a separating stroke of the press, the operator will first depress the treadle 49 to shift the trip-lever 40 and release the cross-` head 38 of thefejector mechanism, whereupon the springs 39 will operate the ejector mechanism downwardly so that the heads 28 will be disposed in recess 29. This operation will be effected while themovable die-operating member 18 is at rest. Charges of material will then be placed in the female dies 14 in the die block 12. When the dies 14 have been thus charged, fluid under pressure.4 will be admitted to cylinder 21 to lower the die-carrying member 18 and' force the dies 20 intov the dies 14 to form the product or articles which, in the construction shown consists of cup-shaped or hollow receptacles. During this operative stroke, rods 44 will lower the cross bar 4'3 which carries the triplever and treadle and when the arms 47 have been lowered sufficiently to clear the cross head 38, the weightof the arm 48 of the lever will cause it to swing into position shown in Fig. 4 in readiness to act upon the after a complete .crosshead 38 for operating the ejectors at the end of the next separating stroke. After the product has been formed between the dies, fluid under pressure4 will be admitted to the cylinders 23 to separate the dies. During the initial portion 0f the separating stroke, head 18 and dies 20 will be lifted away from the die block 12 and cross-bar 43 and lever 40 will be lifted. Toward the end of the separating stroke, arms 47 of the triplever will engage the .cross-head 38 and operate the ejectors to lift the articles out of the dies 14.. At the end of the separating troke, the parts will be in position shown in 4`ig. 6 will be atY rest. Before commencement of the next working stroke of the movable d iecarrying member, the operator will remove the product from the upper ends of the ejector heads and after such removal he will depress the treadle 49'to trip lever 40 and release the cross-head 38 so that the springs 39 will restore the ejector heads 14 to their normal position at the bottom of the dies 14. The operator will place charges of materials in dies 14, whereupon the press will be ready for another operative stroke. During the succeeding operating stroke, the trip lever will lbe automatically. shiftedinto position to operate the ejector at the end of the succeeding separating stroke as heretofore set forth. y

rlhe invention exemplifies an improved Huid pressure operated press in which mechanism is provided whereby the ejector is operated by power to discharge' the product from the dies and which can be manually tripped by the operator to restore the ejecand the movable die carrying head 18.

lll

Leonesa tors to normal position before the duid pressure operated member commences the nent working stroke. As a result, the operator can, without danger of injury, place charges ot material in the dies while the movable die-carrying member is at rest or betere the commencement ot an operative stroke. rthe improved ejector mechanism is adapted to be applied to different die-blocks and is simple in construction and eilicient in operation.

The invention is not to be understood as restricted to the details set lorth, since these may be modilied within the scope oi the appended claims, without departing trom the spirit and scope or the invention.

Having thus described the invention, whatA l claim as new and desire to secure by Let- ,fters Patent, is:

il. lln a press, the combination oil coacting die members, `l-luid pressure mechanism for operating one ot the members to and from the other, a product ejector and a trip device tor the ejector supported by and operatively connected to said mechanism, 'and manually operable to retract the ejector at all times while the members are separated.,

vf2. ln a press, the combination of coacting die-carrying members, duid pressure mechanism for operating one ot the members to and :trom the other, alproduct ejector, and means for operating the ejector by said duid pressure mechanism comprising a manually operable lever mounted to be shifted bodily and supported by said. mechanism and whereby the ejector-may be retracted while the duid pressure mechanism is idle.

3. ln a press, the combination of coacting die carrying members, duid pressure mechanism for operating one oit the members to and from the other, a. product ejector and means :tor operating the ejector bysaiol tluid pressure mechanism comprising a manually operable trip-lever supported by and having an abutment arm `lor shitting the ejector .and whereby the ejector may be retracted while the Ifluid pressure mechanism is idle.

il. ln a press, the combination olf a bed, coacting die members, one oit which is supported on the bed, fluid pressure mechanism for operating the other member, a product ejector in the stationary member, a trip device 'lor the ejector, connected to and supported by the movable member.

5. ln a press, the combination oa bed, coacting die members, one oit which is supported on the bed, fluid-pressure mechanism Jl-or operating the yother member, a productejector in the stationary member, and means tor operating the ejector by said duid pressure mechanism comprising a cross-head secured to move constantly with the movable die member and a manually operable trip lever pivoted on the cross-head and adapted to control the retraction oi' the ejector.

6. ln a press, the combination of a bed,

'lil

7. lin a press, the combination ot coacting die-carrying members, duid pressure mechanism for operating one or the members to and from the other, a product ejector, ejector-supporting means, and means tor operating the ejector by said fluid pressure mechanism comprising a. trip lever mounted to be shitted bodily and supported by .said operating means and operable to release the ejector-supporting means to retract the ejector when the tluid pressure mechanism is at rest, and a lost motion connection between the lever and the ejector supporting means whereby the lever alter releasing the ejector will be released 'to automatically pass into operative position during the working stroke.

d. ln a press, the combination of a bed, co-

. acting die carrying members, one of which is supported by the bed, duid pressure mechanism for operating the other member, a product ejector slidable in the stationary member, a cross head below the bed to which the ejector is secured, a trip-lever below the bed ifo-r operating said cross-head and means for operating the lever by said duid pressure mechanism to shii't the cross-head and ejector, said lever being operable to release the ejector when the duid pressure mechanism is at rest. l

9. ln a press, the combination el a bed, enacting die carryingl members o-ne off which is supported by the bed, Yduid pressure mechanism for operatin the other member, a product ejector slidab e in the stationary member, a lever below the bed for operating the ejector in one direction, spring-means lor retracting the ejector, and meansv l-or operating said lever by said duid-pressure mechanism, said lever being operable to release the ejector itor retraction by the spring-means..

l0. ln a press, the combination ol a bed, coacting die carrying members, one of which is supported by the bed, iluid pressure mechanism tor operating the other member, a product ejector slidable in the stationary member, an ejector-supporting bar between the stationary member and the bed, a crosshead below the bed to which said bar is connected, a lever below the bed for operating the cross-head in one direction, and means for operating the lever by said fluid pressure mechanism, said lever being operable for retraction of the ejector while the luid pressure mechanism is at rest.

lltl

l1. In a press, the combination of a stationary bed, brackets secured on the bed, a removable die carrying member mounted on the brackets, a movable coacting die-carrying member, fluid pressure mechanism for operating said movable member, a product ejector slidably mounted in the stationary member, a transverse bar disposed between said brackets and to which the ejector is secured, end-@bars to which said cross-bar is removably secured, a cross-head below the bed, rods slidably mounted in the bed and secured to said end bars and tothe cross head, and means operated' by said fluid-pressure mechanism for operating vthe ejector comprising a trip lever operable to release the cross-head for retract1on of the ejector while the fluid pressure mechanism is idle.

12. In a press, the ombination of" a stationary bed, brackets secured on the bed, a removable die-carrying member mounted on the brackets, a movable coacting die carrying member, fluid pressure mechanism for operatino' said movable member, a productejector s idably mounted in the stationary member, a transverse bar disposedbetween said backets and to which the ejector is secured, end bars to which said cross-bar `is removably secured, a cross-head below the bed, rods slidably mounted in the bed and secured to said end bars and to the cross head, springs between the cross-head and the bed, and means operated by fluid pressure mechanism for operating the ejector comprising aftrip lever adapted to engage `and operate said cross head and operable toJ release the cross-head While the fluid pressure mechanism is idle.

13. In a press, the combination of a stationary bed, brackets secured on the bed, a 40 I nism for operating. the ejector comprising a cross-bar and a trlp lever mounted on the` latter and adapted to operate the cross-head when the fluid pressure mechanism is operated in one direction and manually operable to release the cross head for retraction of the ejector When the fluid pressure mechanism is idle.

EUGENE L. vMGGARY. 

